19s are a very good day to day wheel. i wouldn't have the 20s. mine is a DD and it has yet to let me down, 89K miles. but it doesn't snow here, and when it does we drink and stay home.

now if you are so inclined and as you live in the frozen tundra i would suggest you consider 20s for summer and 18s (if you can believe them Canadians) for snow.